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https://issues.apache.org/jira/browse/OFBIZ-6747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17615508#comment-17615508
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Ben Manes commented on OFBIZ-6747:
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Sorry, I did not mean for you to replace {{UtilCache}} as it provides a nice 
abstraction. The internal implementation could switch from CLHM to Caffeine. 
This would be less invasive as Caffeine offers all of the older library's 
functionality, with the caveat that the eviction policy differs (if sadly 
someone depended on LRU behavior). It may be that you could reduce code by 
migrating features like expiration and soft references to Caffeine, but that 
would be a larger, more complicated effort.

> Replace ConcurrentLinkedHashMap by Caffeine
> -------------------------------------------
>
>                 Key: OFBIZ-6747
>                 URL: https://issues.apache.org/jira/browse/OFBIZ-6747
>             Project: OFBiz
>          Issue Type: Task
>          Components: ALL COMPONENTS
>            Reporter: Ben Manes
>            Assignee: Jacques Le Roux
>            Priority: Minor
>
> Similar to OFBIZ-3779, please consider upgrading the library used by 
> [UtilCache|https://github.com/apache/ofbiz/blob/trunk/framework/base/src/main/java/org/apache/ofbiz/base/util/cache/UtilCache.java]
>  (v1.2). The current version is 1.4.2 and is the last major release planned.
> The preferable alternative would be to upgrade to 
> [Caffeine|https://github.com/ben-manes/caffeine]. This is a Java 8 rewrite 
> based on what I've learned since developing CLHM and Guava's cache. As 
> expected it provides [superior 
> performance|https://github.com/ben-manes/caffeine/wiki/Benchmarks]. It also 
> provides a [near 
> optimal|https://github.com/ben-manes/caffeine/wiki/Efficiency] eviction 
> policy.



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